Nanpeidai Onsen
Analysis UnverifiedThe Bato Onsen area of Nakagawa sits among the clear Naka River and the wooded Yamizo hills. Nanpeidai Onsen has been used on its hilltop site since 1973, and in 1987 a 1,030 m well tapped a plentiful new alkaline flow. Its silky pH 9.6 water is known locally as a "beauty bath" and is also used for drinking cures.
The bar length shows how abundant each component is compared to thresholds that make it "distinctive" (therapeutic spring standards, beauty spring criteria, etc.).
Scores are calculated from mineral analysis data based on the Mineral Spring Analysis Guidelines (Ministry of Environment, Japan). They are unrelated to facility atmosphere or service quality.
▸Note
The temperature, pH and component values shown here are based on the hot spring analysis (source). Actual values in the bath may differ depending on heating, dilution, recycling and filtration. Please check current usage status at the facility.
The source emerges at 43.9°C. At pH 9.6 it softens the skin's surface, so soak slowly and avoid hard scrubbing; moisturize soon after bathing to keep the smooth feel.
With pH 9.6 alkalinity plus 49.1 mg/kg of carbonate and 97.4 mg/kg of bicarbonate, this gentle simple spring is loved for silky skin and invites deep relaxation.
Alkaline water can dry the skin with long soaks or hard scrubbing; moisturize afterward and drink water before and after bathing. Follow the facility's guidance for drinking the water.
※ See the analysis data below for detailed contraindications
ANALYSIS DATAView all analysis fields ▼
Source Info
- Source name
- Nanpeidai Onsen
- Spring type
- Alkaline Simple Hot Spring
- Source temperature
- 43.9℃
- pH
- 9.6
- Flow rate
- 361 L/min
- Flow type
- 動力揚湯
- Osmotic pressure
- 低張性
Analysis Document
- Analysis date
- 2015-09-03
- Analyst organization
- 一般社団法人栃木県薬剤師会
- Registration No.
- 14栃薬1号
Cations
- Hydrogen ion H⁺
- 0.00 mg/kg
- Lithium ion Li⁺
- 0.00 mg/kg
- Sodium ion Na⁺
- 108 mg/kg
- Potassium ion K⁺
- 0.40 mg/kg
- Ammonium ion NH₄⁺
- 0.00 mg/kg
- Magnesium ion Mg²⁺
- 0.20 mg/kg
- Calcium ion Ca²⁺
- 1.6 mg/kg
- Aluminum ion Al³⁺
- 0.00 mg/kg
- Manganese ion Mn²⁺
- 0.00 mg/kg
- Iron(II) ion Fe²⁺
- 0.00 mg/kg
- Iron(III) ion Fe³⁺
- 0.00 mg/kg
- Zinc ion Zn²⁺
- 0.00 mg/kg
- Lead ion Pb²⁺
- < 0.01 mg/kg
- Strontium ion Sr²⁺
- 0.00 mg/kg
- Barium ion Ba²⁺
- 0.00 mg/kg
- Copper ion Cu²⁺
- < 0.01 mg/kg
- Cadmium ion Cd²⁺
- < 0.01 mg/kg
- Total cations
- 0.11 mg/kg
Anions
- Fluoride ion F⁻
- 0.90 mg/kg
- Chloride ion Cl⁻
- 17.6 mg/kg
- Hydroxide ion OH⁻
- 0.70 mg/kg
- Hydrogen sulfide ion HS⁻
- 0.10 mg/kg
- Thiosulfate ion S₂O₃²⁻
- 0.00 mg/kg
- Sulfate ion SO₄²⁻
- 54.6 mg/kg
- Bicarbonate ion HCO₃⁻
- 97.4 mg/kg
- Carbonate ion CO₃²⁻
- 49.1 mg/kg
- Bromide ion Br⁻
- 0.00 mg/kg
- Iodide ion I⁻
- 0.00 mg/kg
- Hydrogen sulfate HSO₄⁻
- 0.00 mg/kg
- Hydrogen thiosulfate HS₂O₃⁻
- 0.00 mg/kg
- Nitrite ion NO₂⁻
- 0.00 mg/kg
- Nitrate ion NO₃⁻
- 0.00 mg/kg
- Dihydrogen phosphate H₂PO₄⁻
- 0.00 mg/kg
- Hydrogen phosphate HPO₄²⁻
- 0.00 mg/kg
- Phosphate ion PO₄³⁻
- 0.00 mg/kg
- Arsenite ion AsO₂⁻
- 0.00 mg/kg
- Sulfide ion S²⁻
- 0.00 mg/kg
- Hydrogen metasilicate HSiO₃⁻
- 0.00 mg/kg
- Metasilicate ion SiO₃²⁻
- 0.00 mg/kg
- Metaborate ion BO₂⁻
- 0.40 mg/kg
- Total anions
- 0.22 mg/kg
Undissociated Components
- Sulfuric acid H₂SO₄
- 0.00 mg/kg
- Phosphoric acid H₃PO₄
- 0.00 mg/kg
- Arsenious acid HAsO₂
- 0.00 mg/kg
- Metasilicic acid H₂SiO₃
- 45.1 mg/kg
- Metaboric acid HBO₂
- 0.00 mg/kg
- Total undissociated
- 0.05 mg/kg
Dissolved Gas
- Free carbon dioxide CO₂
- 0.00 mg/kg
- Free hydrogen sulfide H₂S
- 0.00 mg/kg
- Total dissolved gas
- 0.00 mg/kg
Totals
- Total dissolved substances
- 0.38 mg/kg
- Component total
- 0.38 mg/kg
- Evaporation residue
- 0.29 mg/kg
Usage
- Usage status
- Unknown
Indications & Contraindications
- Bathing indications
- Autonomic instability, Insomnia, Depression
- General indications
- High blood pressure (mild), Rheumatoid arthritis, Chronic pain or stiffness in muscles and joints, Muscle stiffness due to motor paralysis, Gastrointestinal dysfunction
- Contraindications
- Acute illness (especially with fever), Active tuberculosis, Malignant tumors, Severe heart disease, Respiratory failure, Renal failure, Bleeding disorders, Severe anemia, Any actively progressing illness, Pregnancy (especially early and late stages)
Drinking
- Drinkability
- Not drinkable
